Centrifugally controlled valve



June 4, 1935. J w E 2,003,857

CENTRIFUGALLY CONTROLLED VALVE Original Filed Aug. 7, 1953 u'fi'. (0

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fiu/enior Jesse Wfiwle Patented June 4, 1935 UNITED STATES PATENT OFFICEOriginal application August 7, 1933, Serial No.

683,918. Divided and this application Decem- -ber 9, 1933, Serial No.701,720

8 Claims.

This invention relates to a centrifugally controlled valve adapted tocontrol pressure flow utilized to produce desired gear positioning in achange speed device of the type shown in my pending application, SerialNo. 683,918, new Patent No. 1,980,798, of which this is a divisionalapplication.

With most change speed devices, it is desired to provide controlproducing desired gear ratios automatically adjusted to the ability ofthe engine to handle the load and yet to have this control subjected tothe operator's dominance.

One of the difliculties encounteredwith such controls is that ofpreventing re-shifting when a shift permits the same or greater speed tobe produced by reduced engine speed.

I utilize a control to prevent too sudden response to acceleration andby utilizing part of the fluid under pressure, I am able to lessen theinfluence of the control over the governor to permit a lesser enginespeed to maintain the high speed gear ratio.

I further contemplate using means to prevent my valve from becomingimproperly positioned for I provide detents retarding valve movementuntil a positive movement is ensured and ensuring its movement farenough to produce the desired flow of fluid to affect a change of speed.

In the drawing I have shown an embodiment 30 of my invention adaptedprimarily for use with an automobile though its other uses are obvious.Throughout the drawing and specification, like reference numerals areemployed to designate corresponding parts and in the drawing:

centrifugally controlled valve and the dominant operator controls, and

Fig. 2 is a face view of a lock to prevent movement. 7

In a casing I, I mount a spool piston 2 on a rod 3 which carries acollar 4 depressed by a spring 5.

The spool piston 2 is formed with an annular recess 2a and a centralbore 6 having radial vents Fig. 1 is a view partly in cross section ofmy piston l9 and the piston rod 20 are provided with provided to preventupward, movement of the rod 3.

From any suitable source of power, a gear 9 in mesh with the gear I0 isrotated. Pivotally mounted on the gear III are the weighted arms I l 5which are swung outwardly as the gears 9 and V I0 rotate more rapidlyand as the arms ll fly outwardly the contacts 12 lift the collar 4 onthe rod 8 against the pressure of the spring I.

On the rod 3, I form notches l3 and I4 adapted to receive the member I!under the tension of the spring It in the casing I'I.; These notchestend to retard the movement of the shaft and as the notches are formedwith a common apex and positioned in relation to the position of thepiston 1 2 to affect low and high speed, the rod will snap upwardly ordownwardly ensuring operative positioning of the piston 2. When thepiston 2 has moved upward so that the outlet 13 is connected torelief 8,the notch l3 receives the member It. In this position my change speeddevice as shown in my pending application, Serial No. 683,918, isadjusted to low speed gear ratios as the inlet A is connected to neitheroutlets B or C in this position.

With increase in engine speed the piston 2 is carried upwardly and thenotch It on the rod 3 receives the member l5. In this position, theinlet A and the outlet C are connected by the annular recess 20. Thisflow may be utilized to produce a high speed gear ratio such as directdrive.

As'one of the obstacles tobe overcome has been the tendency to shiftback, I provide abranch fluid line l8 from the outlet C. This enters thecasing l in the zone of relief 8. 5

Within the casing I in this zone is a piston I! having its piston rod 20formed as at 2| to seal the pipe It. The piston l9 carries a spring 22adapted to bear against the spool piston 2. The a central bore I911permitting drainage to relief.

When the piston 2 is in its highest position, fluid under pressure willpass through the pipe l8 and carry the piston l9 upwardly so that itwill be in the position shown in Fig. 1. In that position, it willoffset the pressure of the spring 5 permitting a slower engine speed tomaintain the piston 2 in position. i

Anchored as at 23 is a lever 24 formed to re-. ceive the rod 3 throughthe .aperture 25 unless the aperture 25' is closed by the lock 26. Thelock 28 and a control to hold the change speed device in neutral may bemade to act together if it is desired to warm themotor or repair it.Normal- 56 1y, however, the 106K 26 is kept in operative position by thespring 21.

The lever 24 is adapted to bear against the washer 28 on the spring 5 toincrease spring tension against the collar 4 to retard governor actionand increase acceleration or deceleration.

The lever 24 is influenced by action of the brake 29 and the accelerator30 through the pull rod 3|, the pivoted elbow member 32, the rod 33, andthe lever 34. The lever 34 includes an arm 35 to be contacted by thebrake 29 and an arm 36 to be contacted by the accelerator 30. A stop 31prevents excessive reverse movement of the levers against the brake 29and accelerator 30. Through this system of control, resistance will beincreased to the upward motion of the rod 3 for both braking andacceleration purposes possible through the difference in leverageafiorded by the arms 35 and 36 on the lever 34.

With my invention, a simple and positive centrifugally controlled valveis provided adapted to permit a desired flow of fluid under pressure.

What I therefore claim and desire to secure by Letters Patent is:

1. A valve comprising a casing having top and relief apertures, a fluidinlet and fluid outlets above and below said inlet, a piston in saidcasing having an annular recess adapted to connect said inlet with oneof said outlets, a rod carrying said piston, a collar on said rod, acompressible member influencing said collar and rod, means responsive toengine speed to carry said rod upwardly against said compressiblemember, a detent to prevent premature movement of said rod, and means inconnection with one of said outlets to counteract the pressure of saidcompressible member.

2. A valve comprising a casing having top and relief apertures, a fluidinlet and fluid outlets above and'below said inlet, a piston in saidcasing having an annular recess adapted to con-. nect said inlet withone of said outlets, a rod carrying said piston, a collar on said rod, acompressible member influencing said collar and rod, means responsive toengine speed to carry said rod upwardly against said compressiblemember, a detent to prevent premature movement. of said rod, means inconnection with one of said outlets to counteract the pressure of saidcompressible.

member, and means adapted to be actuated by a brake and acceleratorcontrol to increase the resistance of said compressible member to upwardmovement of said'rod.

3. A valve comprising a casing having top and relief apertures, a fluidinlet and fluid outlets above and below said inlet, a piston in saidcasing having an annular recess adapted to connect said inlet with oneof said outlets, a rod carrying said piston, a collar on said rod, acompressible member influencing said collar and rod, means responsive toengine speed to carry said rod 'upwardly against said compressiblemember,

means adapted to be actuated by a brake and accelerator control adaptedto increase the resistance of said compressible member to upwardmovement of said rod, an inverted compensating piston below said firstnamed piston, one of said outlets having a branch line to admit fluidunder pressure to said compensating piston, a piston rod having branchline closing members on the end thereof, a resilient member carried bysaid second named piston whereby when said outlet and saidinlet areconnected, said inverted piston will be raised to counteract thepressure of said compressible member.

4. A valve comprising a casing having top and relief apertures, a fluidinlet and fluid outlets above and below said inlet, a piston in saidcasing having an annular recess adapted to connect said inlet with oneof said outlets, a rod carrying said piston, a collar on said rod, acompressible member influencing said collar and rod, means responsive toengine speed to carry said rod upwardly against said compressiblemember, means in connection with one of said outlets to counteract thepressure of said compressible member, means adapted to be actuated by abrake and accelerator control to increase the resistance of saidcompressible member to upward movement of said rod, and a lock toprevent upward movement of said rod regardless of engine speed.

5. A- valve comprising a casing, a fluid inlet and fluid outlets aboveand below said inlet, a drainage relief port insaid casing, a piston insaid casing adapted to connect said inlet with one of said outlets, agovernor in control of said piston, a compressible member adapted todepress said governor, detents to prevent premature movement of saidpiston, means in connection with one of said outlets to counteract thepressure of said compressible member, and said piston and said meanshaving apertures adapted to permit fluid above said piston and betweensaid piston and said means to escape through said drainage port.

6. A valve comprising a casing, a fluid inlet and fluid outlets aboveand below said inlet, a piston in said casing adapted to connect saidinlet with one of said outlets, a governor in control of said piston, acompressible member adapted to depress said governor, detents to preventpremature movement of said piston, means in connection with one of saidoutlets to counteract the pressure of said compressible member, andmeans adapted to be influenced by brake and accelerator controls wherebythe resistance against upward movement of said piston is increased.

7. A valve comprising a casing, a fluid inlet and fluid outlets aboveand below said inlet, a piston in said casing adapted to connect saidinlet with one of said outlets, a governor in control of said piston, acompressible member adapted to depress said governor, detents to preventpremature movement of said piston, means in connection with one of saidoutlets to counteract the pressure of said compressible member, andmeans in control of said compressible member adapted to be depressed bybrake and accelerator controls whereby the resistance against upwardmovement of said piston is increased.

8. A valve comprising a casing, a fluid inlet and fluid outlets aboveand below said inlet, a piston in said casing adapted to connect saidinlet with one of said outlets, means responsive to engine speed incontrol of said piston, a member adapted to depress said means, detentsto prevent premature movement of said piston, means in connection withone of said outlets to counteract the pressure of said compressiblemember, and a lock to prevent upward movement of said rod regardless ofengine speed.

JESSE W. HALE.

